Method and system for solving flooding problems caused by mac address hash conflicts
A MAC address and flooding technology, applied in transmission systems, digital transmission systems, data exchange networks, etc., can solve the problems of MAC address HASH conflict and low cost, achieve less CPU resource occupation, low cost, and improve ACL multiplexing rate effect
Active Publication Date: 2022-03-25
成都烽火云网信息技术有限公司
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Problems solved by technology
[0004] In view of the defects existing in the prior art, the purpose of the present invention is to provide a method and system for solving the flooding problem caused by MAC address HASH conflicts, with low cost and less CPU resource occupation
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[0032] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
[0033] An embodiment of the present invention provides a method for solving the problem of flooding caused by MAC address HASH conflict, including the following steps:
[0034] When there is a MAC address HASH conflict, the forwarding chip reports the conflict information;
[0035] Create an ACL entry in the ACL entry of the forwarding chip, write the conflict information into the newly created ACL entry, and establish a redirection mapping;
[0036] Periodically try to write the ACL entry into the original MAC address forwarding table until it succeeds.
[0037] When the forwarding chip receives the packet with the source MAC address and VLAN matching the ACL entry, it redirects the packet to the source port that receives the packet in the conflict information corresponding to the ACL entry.
[0038] As a preferred implementation manner, t...
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The invention discloses a method and system for solving the flooding problem caused by MAC address HASH conflicts, and relates to the technical field of switching and forwarding. The invention writes the conflict information into the ACL entry of the switching chip when a MAC address HASH conflict occurs. At the same time, the source port of the received message in the conflict information is used as the redirection port of the ACL entry, simulating a MAC address forwarding table; and a timer is started for the aging related operation of the MAC address recorded in the ACL entry. The present invention uses the ACL entry of the switching chip itself without using the externally expanded TCAM table, and only uses one ACL entry to solve an address conflict, which is low in cost; only creates an entry for the conflicting address, and starts the timer to age regularly, without the need for Use additional ACL table counting, occupy less CPU resources, and improve the ACL multiplexing rate; still use hardware resources for corresponding forwarding, fully achieve wire-speed forwarding, and excellent forwarding performance.
Description
technical field [0001] The invention relates to the technical field of switching and forwarding, in particular to a method and a system for solving the problem of flooding caused by MAC address HASH conflict. Background technique [0002] MAC address learning and forwarding are the core and the most basic function of all switching devices. If MAC address learning conflicts, it will directly waste network bandwidth and even affect the normal interaction of services. It is necessary to solve the problem of packet loss or flooding caused by MAC address conflicts. [0003] The MAC address learning conflict is essentially caused by insufficient hardware resources of the switch chip. When the HASH calculation value is the same and the corresponding hardware block entries are full, a HASH conflict will occur, and the MAC address will not be learned, and the MAC address will be used as the destination address in the future. The packets will be flooded, affecting the network. SUMM...
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IPC IPC(8): H04L45/00H04L61/5046H04L12/46H04L101/622
CPCH04L45/54H04L45/32H04L12/4641H04L61/5046H04L2101/622
Inventor 魏自强
Owner 成都烽火云网信息技术有限公司